Backpack
A backpack comprises a load carrying section with a forwardly facing front panel. A pair of mutually spaced sleeves are joined to and border the sides of the front panel. An injection molded generally U-shaped partial perimeter frame has a base bordering a bottom of the front panel, with arms projecting from the base and into the sleeves on the sides of the panel. The load carrying section of the backpack is comprised principally of fabric. The front panel is flexible and has a stiffness greater than the stiffness of the fabric forming other portions of the backpack. In one embodiment, the front panel is integrally stiffened. In another embodiment, the front panel forms a pocket configured and dimensioned to accept a flexible stiffening plate.
1. A backpack comprising: a load carrying section having a forwardly facing front panel; a pair of mutually spaced sleeves joined to and bordering sides of said front panel; and a generally U-shaped frame having a base bordering a bottom of said front panel, said base having a generally flat midsection with forwardly curved resiliently flexible end sections, and mutually spaced arms with longitudinally twisted spiral configurations projecting in cantilever fashion from said end sections and into said sleeves.
2. The backpack of claim 1 wherein said load carrying section is comprised of a fabric, and wherein said front panel has a stiffness greater than the stiffness of said fabric.
3. The backpack of claim 1 wherein said front panel defines a pocket between said sleeves, and wherein a flexible stiffening plate is contained in said pocket.
4. The backpack of claim 3 wherein said sleeves and said pocket have bottom openings configured and arranged respectively to accommodate insertion of said arms and said stiffening plate.
5. The backpack of claim 1 wherein said sleeves and said arms are inclined laterally inwardly towards a central axis of the backpack.
6. The backpack of claim 1 further comprising a flexible web extending between the end sections of said base at a location spaced forwardly from the midsection of said base.
7. The backpack of claim 1 wherein said front panel, said sleeves and the arms of said frame are configured to coact in defining a forwardly facing generally concave recess.
8. The backpack of claim 1 wherein the arms of said frame are generally concave in the forwardly facing direction.
9. The backpack of claim 1 or 8 wherein the arms of said frame have a degree of twist that gradually diminishing from the base of said frame to the distal ends of said arms.
10. A backpack comprising: a load carrying section having a forwardly facing front panel, said load carrying section being stitched from a fabric, and said front panel having a stiffness greater than the stiffness of said fabric; a pair of mutually spaced sleeves joined to and bordering sides of said front panel; and a generally U-shaped frame having a base bordering a bottom of said front panel, said base having a generally flat midsection with forwardly curved resiliently flexible end sections, and mutually spaced arms with longitudinally twisted spiral configurations projecting in cantilever fashion from said end sections and into said sleeves, said sleeves and said arms being inclined laterally inwardly towards a central axis of said backpack.
11. A backpack comprising:
a load carrying section having a forwardly facing front panel;
a pair of mutually spaced sleeves joined to and bordering sides of said front panel; and
a generally U-shaped frame having a base with a generally flat midsection bordering a bottom of said front panel, said base having forwardly curved resilient flexible end sections from which mutually spaced arms project in cantilever fashion into said sleeves, said sleeves and said arms being inclined laterally inwardly towards a central axis of said backpack.